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TPS4H160-Q1: TPS4H160BQPWPRQ1 has been damaged

Haim Liberman
Prodigy 60 points
Part Number: TPS4H160-Q1

Hello TI team

See attached image

Red is the input signal

Green is the output signal. Max load I connected was 4 Ohm. Component TPS4H160 has burned out. Why how I protect the component

Thanks

  • 0
    TI__Genius 16390 points

    Hello Haim,

    The device is designed to operate with bus voltage 4-40V. The waveform showing that the input voltage goes down to 0V and the spike goes beyond 60V. The high spike will damage the device. If you are trying to test out the device, probably use a smoother DC signal.

    I'm wondering why there isn't a cap to smooth out the input signal?

    Regards,

    Yichi

  • 0
    Prodigy 60 points

    Hello Yichi 

    Input signal came from bridge diode and transformer 29VAC . I connected to your eval board 4 ohm load . pulses are coming from your component

  • 0 in reply to Haim Liberman
    Prodigy 60 points

    I have to use transformer & bridge diode

  • 0 in reply to Haim Liberman
    TI__Genius 16390 points

    Hello Haim,

    If you disconnect our device and just probe the output of your bridge diode, do you still see the spikes? The fact that the input goes down to 0, and spike up to over 60V (please double check if it's from the output of diode rectifier or it's from our device) will cause our device malfunction. What I've seen normally is that people will add a cap at the output of the rectifier so that the output waveform is more stable DC. This will definitely help with the spike and UVLO issue.

    Regards,

    Yichi